Normally the scaffolder will not overwrite existing files in
the destination folder.

If you set --update-json to true, the scaffolder will
overwrite existing JSON files in the destination folder.

The way it overwrites is by merging the new version of the JSON
file from the scaffolder into the destination folder.

It is not recommended you commit these new JSON files, the
scaffolder will probably have overwritten or deleted JSON
fields you wanted to keep. It's recommended you use
git add -p to cherry pick the new changes you want from the
scaffolder.